Since the Russian is not sold in 44 Spcl, to my knowledge, I doubt that Uberti bored the cylinder deep enough to chamber the Special, but they might have. In the case of Opentops and conversions, Uberti sold them chambered for 44 Russian only (some early ones, and so marked), 44 Colt, and 44 Special. Customers tended to want the guns to be marked 44 Colt or Russian because it sounded more old timey. So finally Uberti finally just started making all the cylinders 44 Special to simplify it, no matter which marking was on the barrel. And later they just marking them all 44 Spcl to simplify things. Howsomever, the Russian topbreak is a different animal. I still say if the gun will chamber them, meaning any 44 Spcl including an empty case, it will be perfectly fine to shoot.